Yeowww!® Catnip is appropriately named due to the phenominal reaction cats have to Ducky World catnip! Ducky World has worked with a private farmer for years to cultivate the best catnip in the world. Samples from additional professional growers each year to ensure that their catnip is the highest quality based on freshness, color and aroma. No chemicals or pesticides are used in cultivation, which means Yeowww!® Catnip is completely safe for cats and humans. The all leaf and flower top blend ensures Yeowww!® Catnip to be the strongest on the market that no competitor can compete with!